Air diffusers



FIG. 1 is a bottom view illustration of an air diffuser, according to an aspect of our new design.

FIG. 2 is a rear view illustration thereof.

FIG. 3 is a top view illustration thereof.

FIG. 4 is a right side view illustration thereof.

FIG. 5 is a front view illustration thereof.

FIG. 6 is a rear, top perspective view thereof; and,

FIG. 7 is a left side view illustration thereof. 

CLAIM The ornamental design for an air diffuser, as shown and described. 